570 DORIDIDiE. 



for depositing their spawn in a multi-spiral thread, instead 

 of a flattened ribband of few coils, as is usual with their 



congeners. 



Doris pusilla Avas taken by its describers, among rocks, 

 during a low spring tide, at Torquay in Devonshire. 



15. D. SPARSA, Alder and Hancock. 



Alder and Hancock in Annals Nat. Hist. vol. 18, p. 293, and Monograph, 

 part 4, fam. 1, pi. 14. 



Body (a quarter of an inch long) much depressed, ovate, 

 rounded at each end. Cloak extending very little beyond 

 the foot, yellowish with distant ferruginous spots, and 

 covered with small, obtuse, flattened, rather distant, 

 unequal spiculose tubercles, which decrease in size towards 

 the margin. Dorsal tentacles rather conical, whitish, 

 issuing from cavities with tubercular edges. Oral veil 

 semicircular, expanded. Branchial plumes nine, very 

 small, simply pinnate, colourless, arranged around the 

 vent in an incomplete circle, leaving a small tuberculated 

 space within them. 



A single specimen was obtained from the fishermen''s 

 lines by its describers, at Cullercoats, adhering to Bry- 

 ozoa. 



It is nearly allied to dejpressa and pusilla. 



16. Doris piLOSA, Milller. 



Doris pilosa, Muller, Zool. Dan. vol. iii. p. 7, pi. 85, f. 5-8. — Johnston, Ann. 

 Nat. Hist. vol. i. p. 54, pi. 2, fig. 9, 10. 

 „ nigricans, Fleming, Brit. Anim. p. 283. 

 „ Flemingii, Forbes, Malac. Mon. p. 3, pi. 1, f. 1-3. 



Body ovate, very convex, semitransparent, white, yel- 

 lowish, brown, or even black. Cloak not ample, soft, 

 pilose with soft, slender papillae. Dorsal tentacles long, 

 somewhat curved, retractile within denticulated sheaths. 



